Cluster display screen or portion thereof with a transitional graphical user interface



FIG. 1 is a front view of a cluster display screen or portion thereof with a transitional graphical user interface showing a first state of our new design;

FIG. 2 is a first reference view showing a second state in accordance with a first embodiment of our new design;

FIG. 3 is a second reference view showing a second state in accordance with a second embodiment of our new design; and,

FIG. 4 is a third reference view showing a second state in accordance with a third embodiment of our new design.

The broken lines illustrate portions of an instrument cluster that form no part of the claimed design. The appearance of the transitional image sequentially transitions between the images of the first and second states as shown in FIGS. 1-4 . The process or period in which one image transitions to another image forms no part of the claimed design. 

CLAIM The ornamental design for a cluster display screen or portion thereof with a transitional graphical user interface, as shown and described. 